Improvement in car-brakes



J.TARR

CARERAKE .No. 192,719. Patented July 3,1877.

' ATTORNEYS;

MPEFERS, PHOTO-UTHOGRAPHER, WASHINGTON, ,D. 01'

UNITED STATES PATENT OFFICE JOHN TARR, OF LEAVENWORTH, KANSAS.

IMPROVEMENT m CAR-BRAKES.

Specification forming part of Letters Patent No. 192,719, dated July 3,1877 application filed May 5, 1877.

To all whom it may concern Be it known that I, JOHN TARR, ofLeavenworth, in the county of Leavenworth and State of Kansas, haveinvented a new and valuable Improvement in Gar-Brakes; and I do herebydeclare that the following is a full,

perspective detail, and Fig. 3 is a detail, of

the same.

My invention relates to car-brakes; and it consists in the constructionand arrangement of devices, as will be hereinafter more fully set forth,and pointed out by the claims.

The annexed drawing, to which reference is made, fully illustrates myinvention.

A A represent the two axles of a car-truck, provided with the wheels BB, arranged under the car E in the usual manner.

On the outer faces of the wheels B B operate the brake-blocks O 0, saidblocks being attached to front and rear brake-bars D D, suspended fromthe bottom of the car by rods a a. The front brake-bar D is, by a rod,1), connected with the lower end of a lever, G, which is pivoted to theinner side of the rear brakebar, while the upper end of said lever is,by a rod, (1, connected with a chain, c, and this with thebrake-operating mechanism at the front end of the car. I

Onthe front end of the car E, is secured a plate or casting, H, havingat its upper end a forwardly-projecting lug, I, and near its lower endis a rearwardly-extending arm, J, fastened:

to the bottom of the car. This arm is, by side flanges K K, connectedwith the lower portion of the plate or casting H, forming a housing, inwhich is mounted a pulley, L, the said plate, with lug, arm, and sideflanges, being all cast in one piece.

The chain c is passed around the pulley L, and attached to a lug, P,projecting from a plate, R; and this lug P is swiveled on the lower endof a screw-rod, S, which is passed through the lug I, above described,there being for that purpose a hole with female-screw threads made insaid lug I.

The screw-rod S pasess through a guide, T, as shown, and has-ahand-wheel, S, secured on its upper end. By means of this hand wheel thescrew-rod S may be turned in either direction. When turning in onedirection it draws up the lug P, which, by means of the chain 0, appliesthe brakes, and when turning in the opposite direction the lug Pdescends, slackening the chain, and allowing the brakes to come loose.

It will be seen that the plate R, from which the lug P projects, rideson the plate or casting H, preventing wear to the wood-work; and it alsoprevents the lug P from turning by the operation of the screw-rod S.

In the guide T is placed a ratchet-wheel, h, which is so arranged, bymeans of a feather or otherwise, that it will turn with the screwrod,but will allow said rod to move up and down through it at the same time.it is a clog or pawl, arranged to take into said ratchetwheel forholding the brakes when applied.

What I claim as new,'and desire to secure by Letters Patent, isp l. Theplate or casting H, provided with the lug I, having screw-threaded hole,and with the arm J and flanges K, forming a'housing,

substantially as and for the purpose set forth.-

2. The combination, with the casting H, provided with lug I, saidcasting arranged as described, of the screw-rod S, passing through athreaded hole in said lug, the plate R, with of two witnesses.

- JOHN TARR. Witnesses: V

F. R. HUNT, H. M. ALLEN.

